高压水射流靶物识别传声器阵列优化设计

Optimal Design of Microphone Array for The Target Location Detection of High Pressure Water-jet

为了提高高压水射流靶物探测中的靶物定位精度,利用直线型传声器阵列和圆弧形传声器阵列分别进行靶物探测定位,介绍了基于到达时间差的声源定位算法的两种传声器阵列的探测定位原理。利用2L-301型传声器阵列分别搭建了仿真实验装置,利用Lab VIEW和Matlab软件编制了相应的数据采集与处理软件,进行了两种传声器阵列探测定位精度对比和阵列参数优化实验。实验结果表明,圆弧型传声器阵列对高压水射流靶物的定位精度(9.03mm)远高于直线型传声器的定位精度(88.89mm),各传声器相邻最佳距离为200mm,对应的最佳圆周角为30°。

In order to improve the target location detection accuracy of high pressure water -jet, linear micro- phone array and circular microphone array were used for target location detection. The target detection principle of two kinds of microphone array based on Time Difference of Arrival （TDOA） was introduced. Simulation experi- ment device was built by using 2L - 301 microphone array. Data acquisition and processing software was pro- grammed by using Matlab and LabVIEW. The location detection accuracy comparison and array parameter opti- mization experiments of two kinds of microphone array were conducted. Experiment results show that the target positioning accuracy of high pressure water -jet by using the circular microphone array（9.03mm） is much high- er than that of the linear microphone array（88.89mm）. The best distant between the every two microphones was 200mm and the best circumference angel was 30°.